A graduated nativeness definition applied to the vascular flora of Denmark

The data were used to exemplify how a graduated definition of nativeness (native, near-native, distantly native, alien) differs qualitatively and quantitatively from a binary definition (native, alien). The motivation to revise the definition of nativeness comes from insights into problems related to the classic binary nativeness definition. These problems arise from the dynamic nature of species’ distribution ranges on longer time scales, from the application of the binary definition to smaller regions delimited by arbitrary borders, and from limited knowledge of species’ past distributions, their natural migration potential, and time or mode of arrival in the focal area. To remedy these shortcomings, we have proposed a new graduated definition of nativeness, based on geographical proximity to areas where species are native, their migration potential, and climatic niche. We applied the graduated definition to the vascular flora of Denmark, reclassifying species as ‘native’, ‘near-nativ..., , # Data from: A graduated nativeness definition applied to the vascular flora of Denmark

Dataset DOI: [10.5061/dryad.n02v6wx9q](10.5061/dryad.n02v6wx9q)

## Description of the data and file structure

The dataset contains a new graduated nativeness status for the Danish vascular flora. In addition, we list our version of species’ status from a binary definition of nativeness from the three sources: the Euro+Med Plantbase (Euro+Med 2006), the Danish Redlist (Moeslund 2023) and Atlas Flora Danica (Hartvig and Vestergaard 2015). 

Data from Euro+Med (2006) were used to create the graduated definition of nativeness, with Denmark as the focal territory. Species given in that source as non-native in Denmark, but strictly native to one or more of the following neighbouring countries (or Euro+Med territories) were re-classified as  ‘near-native’ : Sweden, Norway, Germany, the Netherlands, Poland, Latvia, Lithuania, Belgium with Luxembourg, the Czech Republic, Estonia, “Baltic states with Kalini...,